No doubt this was an inconvenience to people trying to get to work on the metro, and the number affected (300 million) is staggering, but all the same:
About 40 percent of Indians, or 500 million people, lack electricity.
40% do lack electricity but that does not mean all live without power. The problem in India is that ability to produce enough electricity for all. Hence, people who can afford use generators etc. which nowadays are not that expensive for middle class.
About 40 percent of Indians, or 500 million people, lack electricity.